Valve mechanism for gas-engines.



R. M. ROOF. VALVE MEGHANISM FOR. GAS ENGINES. APPLICATION FILED APR. 19, 1909 995 07 Patented June 20, 1911.

Iii 1. fig. 2.

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INVENTOR Razz-RT M. 00F.

BY r

v MW

ATTORNEY ROBERT M. ROOF, F MUN (21E, INDIANA, AS SIGNOR. TO THE PEOPLES TRUST COMPANY,

TRUSTEE, OF MUNCIE, INDIANA.

oeasoa.

VALVE MECHANISM ron GAS-ENGINES.

Specification of Letterslatent; Patented June 20, 1911.

Application filed April 19, 1999. Serial No. 490,866.

rable construction, and which will not be liable to \get out of order or repair.

More specific objects of my invention are .to provide a valve mechanism of the concentric-valves type, which may be easily installed in operative position and may be easily and quickly removed, and-which will be capable of being operated by direct and very simple actuating means.

The objects of my invention are accomplished by the new construction, combination and arrangement of parts described in this specification, defined in the appended claims, and illustrated in. the accompanying drawings.

' Corresponding parts are referred to by.

similar numerals of reference in-the views shown in the drawings,-in which- Figure 1 is a longitudinal vertical sectional view, and Fig. 2 is a transverse vertical sectional View of my invention The valve chest 1 may form an integral part of the engine cylinder 2, and its water passages 3 will communicatewith the water passages of thesaid cylinder. I provide in tral portion of the saidpartition, and of the wall 7 are bored vertically, and arranged slidingly in the bores is the machined valve-sleeve 8. The head 9 of this valve-sleeve is flared and machined to fit the machined annular opening 10' provided therefor in the partithat leads into the cylinder.

5 the valve chest is the cap 14: in whlch is The usual vaporized tuel which fills the tion 11, and 1 through which said opening there is aliord'ed communication between the exhaust chamber 5 and the port passage 12 upper end of the engine Screwed into the opening 13 of the top of carried the suitable spark plug 15. The portion of the valve-sleeve that is surrounded by the intake chamber/i is provided with thejperforatlons 16; the lower end of the valve sleeve isthreaded and screwed tightly thereon is the flange ring 17 The coil spring 18. having its upper end to bear against the underside of the valve chest, and its lower end against the flange ring, will urge the valvesleeve downwardly and. the opening 10 will be kept normally closed by' the head 9.

uslidingly disposed in the internal guidehead 19 that is supported by the webs formed integral with the valve-sleeve, is the valve stem 20 upon the upper end of'which valve stem. is secured the valve-head 21. The underside of this valve head 21 'is machined to fit the machined internal face 9 of the head 9 of the valve sleeve. The lower end of the valve stem 20 is secured to the piston head 22 which will move slidingly in the said valve sleeve. The coil spring 23 dieposed on the valve stem and having its ends to bear'against' the guide-head 19 and piston head 22 will hold the valve head 21 normally j in closed position on the internal face, 9

The conduits 24 and 25 secured to the outer -face of -the valve chest will communicate general form of motion transmitting means is that shown in the drawing.

In a suitable guide block 26 securedin a position immediately below the valve-sleeve, a tripper sleeve 27 is slidingly disposed; on the sides of the lower end thereof are pivotally retained the rollers 28. Vithin the tripper sleeve is slidingly disposed the tripper head 29 in the lower end of which iscentrally pivoted the roller 30, as plainly shown in, Fig. 2. The cam 30 which will engage the roller 30, and the cams 28? which will engage" the rollers 28,'may be carried by a shaft 31 suitably arranged to be driven by the engine. VYhen the actuating means are operated, the valve head 21 will be raised from its seat 9, while the head f the valve sleeve S valve head 9 is raised, the valve head 21 will be in closed engagement with its seat 9%.

I intake chamber 4 will enter and fill the valvesleeve 8'th'rough the perforations 16; The connections and gearing between the main. shaft of the engine and the shaft 31 are such that with the movement ofthe enginelspis ton from the head of its cylinder, the valve rmits an infimv head "21 is raised which of fuel into the port 12 o the cyl-inder.. As the piston rea'chesthe limit of its stroke the valve head 21 is returned to the'closed' I mits, during the return movement of. the pis- ,ton, the outflowand discharge through the port 1.2 and the exhaust chamber 5,016 the spent products of combustion. As the engines piston reaches the limit of this return stroke the valve head 9 returns to closed position-and the valve head '21- is raised. A fresh'char-ge of vfuel enters and t the operation of the valve mechanism is repeated 1n the manner Just described.

By the newconstruction, combination and arrangement of parts constltuting my invention great advantages are accomplished. This valve mechanism, in addition to be ng compactly constructed, and composed of few will afford a positive andaccurate parts,

More direct and movement of the valves.

unobstructed channels; for intake. and ex-' haust are afforded whereby the possibility ofpre-l1eating ,-of the vaporized mixture isminiinized, and-a free and-complete dis-' 1 charge ofexhaust 1S '3.CCOII1pl1ShGCl. There will be slight noise in operation, -II1 1I11I1111II1.

lubrication will beneeded, and the amount of machine Work. necessary inthe construc- 'tlOI1' of my improvedI valve mechanism is materially reduced Another advantage is t-hatthe fuel intake is from below the ex 'haust outlet and'con'duits thereby simplifying the form'ation and arrangement of the fuel conduit] To-r'einove engine, the ca 14 is unscrewed then the flange ring '1 valve "mechanism may be lifted out; of

.' the valve'c hest. The advantages of this-feature are especially a parent where an engi'ne having aplura ity of cylinders is in' use, as the disuse of one cylinder does "not necessarily render; the engine inoperat ve. The valve-'sleeve and the stem ofthe intake valve being combined ndarranged as shown, the "sleeve being maintained in the thickenedor guide-Way portions of the pan tition and of-the chest wall',.vand'. the-stem of the 'intakle' 'va'lve being maintained by the guide head'fil f) and head 22, thesevalves *tvill operate in' perfect' alinernent and will valve chesthaving a thic the valv'e mechanism from the i is removed, and, the entire wear uniformly under theheaviest duty;

the head '22 performingthe .function of a Y closure for the valve-sleeve, a guide-head for the valve stem, and a head. against which 'actuati-n force ma be im arted from an g Y 5 y form of actuating means. ther advantages are that the exhaust outlet opens out'of the chest at allocation above the intake; the result being that'the exhaust-conduit of the engine is entirely out of the Way of the intake conduit andits connected and adjacent parts. Moreover, the intake chamber being i'em'ote from the exhaust valve opening, the

fuel is protected 01' shielded against becommg overheated before its entry into the ignition chamber or port. Obviously these advantages contribute to the smooth, 'dependableand quiet running of the engine.

I am aware that in carrying out'my invention, minor changes of. formand detail, within the scope defined by the claims,

may be made Without departing from the spirit of my-1nvent1on or sacrificing any of its advantages.

\Vhat l-claim asmy invention and desire to :secure by Letters Patent, is

1. In a valve mechanism of thekind described, the combination of a valve chesthaving an exhaust chamber and an inlet chamber separated by a partition, a port from the said exhaustchamber, a sleeve" adapted to pass through the "said chambers and the said partition and having openings in the portion thereof that is surrounded by the intake chamberthe-inner end of said sleeve being flared to form a valve-for said I port, a removable flange .on the bottom of said sleeve, a spring between the said flange and the wall of'the valve ,chest, a valve at the inner: end of said sleeve having on its stem a head to move sliding-1y 1n the .1111 tenor of said-sleeve, a guide member carried on the inside of the sleeve and in whichthe valve stem may moveslidi-ngly, a springbe. tween the'said head and the valve'head.

2. In a gas engine,-a valve mechanism, in cluding a valve chest, 2, X

enedportion, a bore'in' 'sa-id thickened portion, 'a machined sleeve slidingly disposed in s'aid-bore andv whose endspass through the walls of the artition in said J valve chest a chamber being thereby formed on each side of said partition, an intake into one and anexhaust from the other of said -chambers,; a port leading into the engine.cylinder and-havingan annular seat in the top Wall of the exhaust chamber, an opening in the top Wall of the valve chest of diameter larger than the-diameter of the port opening, a removable cap to close. the

opening in the top wall of. the valve chest, openings in the portion of the aforesaid sleeve that is surrounded by the intake chamber and theupper end of said sleeve. being flared and machined toffit said annularseat, a flange member removably secured to the bottom of said sleeve, a coilspring between the saidflange member and the wall of the valve chest, a valve at the upper end of the said sleeve, a guide head carried on the interior of said sleeve and in which guide head the stem of the said valve is slidingly maintained, a head secured on the lower end of the said stem and slidingly disposed insaid sleeve,-a coil s ring between the said head and the said gui e head.

3. In a gas engine, a valve mechanism'ineluding a valve chest, 'a partition in said valve chest having a thickened portion, a bore in said thickened portion, a thickened portion in the wall of the valve chest,

a bore therein, a machined sleeve slidingly disposed in said bores a chamber being thereby formed on each side of said partitidn,

an intake into one and an exhaust from the other of said chambers, a port leading into the engine cylinder and having ;an annular seat in the top wall of the exhaust chamber, an opening in the to .wall 'of the valve chest of diameter larger t an the diameter of the port opening a removable cap to close the opening in'jthe top wall'of the valve chest,

ppenings in that portion of the sleeve that 1s surrounded by the intake chamber and'the upper end of said sleeve being flared and machined to fit said annular seat, a flange member'removably secured to the bottom of the said machined sleeve, a spring between the said flange member and the wall of the valve chest, a valve at the upper end of saidsleeve, a guide head on the interior of said sleeve, and in which uide head'the'stem-of the said valve is shdingly maintained, a-

head screwed on the lower end of said stem and which will fillbut will move slidingly in said sleeve, a spring between the said head Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. t 

